1 /*
2 * Copyright (c) 2024 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29 /*
30 * mblist.h
31 */
32
33 #ifndef _NET_MBLIST_H
34 #define _NET_MBLIST_H
35
36 #include <sys/kpi_mbuf.h>
37 #include <stdint.h>
38
39 /*
40 * Type: mblist
41 * Purpose:
42 * Simple type to store head, tail pointers for a list of mbuf packets.
43 */
44 typedef struct {
45 mbuf_t head;
46 mbuf_t tail;
47 uint32_t bytes;
48 uint32_t count;
49 } mblist, * mblist_t;
50
51 static inline void
mblist_init(mblist_t list)52 mblist_init(mblist_t list)
53 {
54 bzero(list, sizeof(*list));
55 }
56
57 static inline void
mblist_append(mblist_t list,mbuf_t m)58 mblist_append(mblist_t list, mbuf_t m)
59 {
60 if (list->head == NULL) {
61 list->head = m;
62 } else {
63 list->tail->m_nextpkt = m;
64 }
65 list->tail = m;
66 list->count++;
67 list->bytes += mbuf_pkthdr_len(m);
68 }
69
70 static inline void
mblist_append_list(mblist_t list,mblist append)71 mblist_append_list(mblist_t list, mblist append)
72 {
73 VERIFY(append.head != NULL);
74 if (list->head == NULL) {
75 *list = append;
76 } else {
77 VERIFY(list->tail != NULL);
78 list->tail->m_nextpkt = append.head;
79 list->tail = append.tail;
80 list->count += append.count;
81 list->bytes += append.bytes;
82 }
83 }
84
85 #endif /* _NET_MBLIST_H */
86